Key-bolt.



F. L. H. SIMS.

KEY BOLT.

APPLICATION FILED JUNE 14, 1909.

Patented Aug. 15, 1911.

, A TZORNE 15,3

platesD and the key "U1 ST TBS T ma FREDERICK L. n. snvrs, F enonsnwown, ONTARIO, CANADA, lissxen'on T0 FLQRENGE SIMS, 0F GEORGETOWN, CANADA.

KEY-BOLT.

Specification of Letters Patent.

Patented Aug. 15, 1911.

Application filed June 14, 1900. Serial No. 502,089.

against a washer I bearing on the other angle late D, though the washer may be omitte The bolt passes through a hole in the rail E as shown. The end (Z of the slot remote from the head of the bolt is formed on an incline against which one side of the tapered key "C bears evenly, so that the other side will also hear evenly against the whole width of the washer I, or, if no washer be used, evenly over its whole length against the angle plate D. It will be noted that from the end F' of the-slot the bolt is divided on a plane G extending through the head of the bolt. This plane preferably passes axially through the bolt and is preferably substantially parallel to the sides of the slot B. The reason of this division will hereinafter be set forth. Each half of the bolt has a rib H, preferably wedge shaped formed on the outer or rounded side adjacent to the head and in aplane preferably at right angles to the divisionG. These ribs when the bolt is" driven in place fit tightly in the angle plate D adjacent to the head and not only press the parts of the bolt tightly together but serve to prevent it turning when the key 0 i being bent, as hereinafter described. After the bolt has been instarted in the position shown the key 0 is driven into place by any suitable tneans setting up the joint as time as may be necessary. The smaller end of the key may then be bent as indicated in 4, or otherwise To all whom it may concern:

Be it known that I,FREnumonL.H.S1Ms, of the village of Georgetown, in the Province of Ontario, Canada, have invented cer- 5 tain new and useful Improvements in Key- Bolts, of which the following is a specifica tion.

i This invention relates to bolts of the type with Which'a key passing. through a slot in the bolt is used instead of a nut.

As a ke may be so arranged if desired as to make it. practically impossible for it to become loose as nuts invariably do when used in rail joints, key bolts possess a great advantage in this respect over nut bolts, but the expense of manufacture has hitherto prevented their use in large quantities and my object is to devise a key bolt which may be so cheaply constructed that the bolt, key and washer will compare favorably in cost with the ordinary bplt nut and lock Washer.

I attain my object forming-a bolt with a key slot the bolt being divided longitudinally from the head to the slot on a plane passing between the sides of the slot. This construction enables me to make the bolt by bending upon itself at the middle a suitably shaped blank. I thus avoid the necessity of cutting the slot, at slow and expensive process as punching, the only other practicable method of forming the slot, is inadmissible for reasons hereinafter given.

Figure 1 is a cross section of a rail joint provided with my improved ke bolt. Fig. deformed to prevent any. slackening of the 2 is afiperspective view of the olt. Fig. 3 key under the influence of vibration. Owing to the inclination of the end d of the slot the keyC must always be put in om the proper side. instantly ascertained I prefer to form on one end of the bolt a teat workman by either touch or eye to place the belts in the rail jointin uniform position so that the keys ma all be inserted from the same side by t e workman following with them. The peculiar split construction of the bolt is due to the method of manufacture. I find that cutting the key' slot is too expensive for practical purposes and that it is impoible to punch a key slot in a bolt without materially weakening the bolt. The punching of bolts is also comparatively expensive and therefore I have devised the following method of construction.

From suitably rolled substantially half is a cross section of part of the bolt, showing the shape of the end. of the slot. Fig. 4 is acrosssection through the end of the bolt and key. Fig.5 is a side elevation of the blank from which the bolt is formed. Fig. 6 is aside-elevation of part of a modified form of blank. Fig. 7 is a cross section near the end of the blank. I Fig. 8 is a cross section near the center of the blank. V

In the drawings like letters of reference indicate corresponding parts in the difi'erent figures.

On'reference to Figs. 1v and 2 it .will be seen that my improved bolt is; provided with a head Aand a slotB through which passes a tapered key 0. Without intending to re strictmyself thereby in any way I show my invention as used in rail joints. When so used the bolt head engages one of the angle 0 referably bears In order that this setmay be e which enables a round bars blanks are "formed such as shown in Fig. 5. Centrally of its round side this blank is provided with an excrescence of metal I) which forms the end of the-bolt remote from the head. -Interme diate its ends the blank is reduced in cross-section for a distance substantially equal totwice the length of. the slot 0. This reduction is pref erably madeby making the bolt incrosssectionless than a semicircle. As the bolt is" formed by bending. the blank centrally to bring the faces-of the blank into juxtaposition, the reduction in cross-section of the blank already referred to enables me to form the bolt about a suitable die to suitably shape the slo tkmlfnecessary a still further reduction of metal may be made below the excrescence b asindicated by the upward curve of the under side of the blank in Fig. 6. This avoids a surplus of metal just at each side of the excrescence b which would otherwise require to be got rid of or distributed in the subsequent steps in the formation of the bolt. Adjacent to each end of theblan'k on the curved side are provided excres'cences h which in the process of manufacture furnish the metalfor the ribs H of the finished bolt. -The bolt .is formed from the blank by bending the same while heated to bring its halves into juxtaposition, as already described, and the ends are formed by any suitable dies. The blank is of sufficient length to provide material which may-"be upset to form the bolt head G. By this process of forming the bolt I do not weaken the material in, any way and the whole bolt with the key C may be formed at much less cost than the present nut and the bolt. I find also that, owing to the inner or flat sides of rolled, the fiber of the mately along the sides of enedand strengthened to such an extent that it has been found that the keys may be driven until they bend crescent shape in the plane of their width without stretching the sides of the slot in the smaller end of the bolt.

. What I claim as my invention is 1. A bolt having a key-slot formed there in adjacent to one end and having alongitudinal division extending from the .other my blanks being metal lying -ultiend of-the bolt to the end of the slot,' the end of the slot nearest the end of the bolt being beveled, in having one side inclined at the same angle as the beveled end of the slot and the the slot is toughthe slightest or shearing combination with a wedge,

other substantially at right, angles to the axis of the bolt. v

2. A bolt havinga st'em whose cross-sec- I two similar nected only at the end remote from the head of the bolt and having recesses formed adjacent faces of their stein portions in. the

which recesses together form a key slot, the

half sections of the bolt wherethe recess is [formed being substantially circular segments less than a semi-circle.

3. A bolt comprising a head and stem having a key slot in the stem formed with a beveled'outer end; the bolt having a teat formed on; its head having a predetermined position relative to the ends of the slot, in combination with a wedge having one side inclined'at' the same angle as the beveled end of the slot, the aforesaid teatserving to indicate the proper .side of entrance for the wedge.

having a key-slot formed between its parts,

each part. also having half of the bolt head and a rib extending from the half 'bolt head partly toward the otherplane substantially at formed thereon;

end of the bolt in a right angles to the plane of the division be tween the two parts of the bolt.

5. A blank for the formation of a slotted bolt formed .in two longitudinal parts integrally connected at one end and.

bolt comprising a substantially half round bar reduced in cross section intermediate the ends for a distance substantially equal to twice the length of the desired slot.

6.,A blank for the formation ofa.slotted bolt comprising a substantially half round bar reduced in cross section intermediate 'the ends fora distance substantiallyequal to twice the length of the desired slot and an excrescence of metal located at the middle of the round side-of thebar to form one end-of the bolt. 1

7. A blank for the formation of a'slotted bolt comprising a substantially half round bar reduced in cross section intermediate the ends for a distance substantially equal to twice the length of'the desired slot and a rib formed at each end of the blank at the crown of the round side of-the blank. Toronto, this 31st day of-May 1909.

FREDERICK L. H. SIMS. Signed in the presence of- J. Enw. AYBEE, F. M. MCKENDRIGK. 

